package com.lmx.web.controller;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Random;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.tomcat.util.http.fileupload.FileItemFactory;
import org.apache.tomcat.util.http.fileupload.FileUploadException;
import org.apache.tomcat.util.http.fileupload.disk.DiskFileItemFactory;
import org.apache.tomcat.util.http.fileupload.servlet.ServletFileUpload;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.io.ByteStreams;
import com.lmx.common.util.URLUtil;

@Controller
@RequestMapping("kindeditor")
public class KindEditorController {
	private static Log logger = LogFactory.getLog(KindEditorController.class);
	private static final ObjectMapper objectMapper = new ObjectMapper();

	@RequestMapping(value = "/fileUpload", method = RequestMethod.POST)
	public void fileUpload(HttpServletRequest request,
			HttpServletResponse response,
			@RequestParam(value = "dir") String dir,
			@RequestParam("businessType") String businessType,
			@RequestParam("contentType") String contentType)
			throws ServletException, IOException, FileUploadException {
		logger.info("kindEditor--contentType:" + contentType);
		String savePath = URLUtil.getInstance().getSaveDirPath(contentType,
				businessType);
		// 文件保存目录URL
		String saveUrl = URLUtil.getInstance().getDateDir();
		// String relativePath = URLUtil.getInstance().getRelativePath(name);
		// String savePath1 = URLUtil.getInstance().getFullPath(contentType,
		// businessType, name);
		// 定义允许上传的文件扩展名
		HashMap<String, String> extMap = new HashMap<String, String>();
		extMap.put("image", "gif,jpg,jpeg,png,bmp");
		extMap.put("flash", "swf,flv");
		extMap.put("media",
				"swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb,mp4");
		extMap.put("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2");

		// 最大文件大小
		long maxSize = 10000000;

		response.setContentType("text/html; charset=UTF-8");
		response.setHeader("P3P", "CP=CAOPSAOUR");
		if (!ServletFileUpload.isMultipartContent(request)) {
			response.getWriter().print(
					objectMapper.writeValueAsString(getError("请选择文件。")));
			return;
		}
		// 检查目录
		// File uploadDir = new File(savePath);
		// if (!uploadDir.isDirectory()) {
		// return getError("上传目录不存在。");
		// }
		// 检查目录写权限
		// if (!uploadDir.canWrite()) {
		// return getError("上传目录没有写权限。");
		// }
		//
		String dirName = request.getParameter("dir");
		if (dirName == null) {
			dirName = "image";
		}
		// if (!extMap.containsKey(dirName)) {
		// return getError("目录名不正确。");
		// }
		// 创建文件夹
		// savePath += dirName + "/";
		// saveUrl += dirName + "/";
		File saveDirFile = new File(savePath);
		if (!saveDirFile.exists()) {
			saveDirFile.mkdirs();
		}
		// SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
		// String ymd = sdf.format(new Date());
		// savePath += ymd + "/";
		// saveUrl += ymd + "/";
		// File dirFile = new File(savePath);
		// if (!dirFile.exists()) {
		// dirFile.mkdirs();
		// }

		FileItemFactory factory = new DiskFileItemFactory();
		ServletFileUpload upload = new ServletFileUpload(factory);
		upload.setHeaderEncoding("UTF-8");

		MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;

		Iterator item = multipartRequest.getFileNames();
		while (item.hasNext()) {

			String fileName = (String) item.next();

			MultipartFile file = multipartRequest.getFile(fileName);

			// 检查文件大小

			if (file.getSize() > maxSize) {
				response.getWriter().print(
						objectMapper
								.writeValueAsString(getError("上传文件大小超过限制。")));
				return;

			}

			// 检查扩展名

			String fileExt = file.getOriginalFilename()
					.substring(file.getOriginalFilename().lastIndexOf(".") + 1)
					.toLowerCase();

			if (!Arrays.asList(extMap.get(dirName).split(","))
					.contains(fileExt)) {
				response.getWriter()
						.print(objectMapper
								.writeValueAsString(getError("上传文件扩展名是不允许的扩展名。\n只允许"
										+ extMap.get(dirName) + "格式。")));
				return;

			}
			SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");

			String newFileName = df.format(new Date()) + "_"
					+ new Random().nextInt(1000) + "." + fileExt;

			try {

				File uploadedFile = new File(savePath, newFileName);

				ByteStreams.copy(file.getInputStream(), new FileOutputStream(
						uploadedFile));

			} catch (Exception e) {
				response.getWriter().print(
						objectMapper.writeValueAsString(getError("上传文件失败。")));
				return;

			}
			Map<String, Object> msg = new HashMap<String, Object>();
			msg.put("error", 0);
			msg.put("url",
					URLUtil.getInstance().getResourceServerUrl()
							+ URLUtil.getInstance().getRelativePath(
									contentType, businessType, newFileName));
			String clintUrl = URLUtil.getInstance().getClintUrl();
			String redirectUrl = clintUrl + "/redirect.html?s="
					+ objectMapper.writeValueAsString(msg);
			response.sendRedirect(response.encodeRedirectURL(redirectUrl));
			return;
		}
		return;
	}

	private Map<String, Object> getError(String message) {
		Map<String, Object> msg = new HashMap<String, Object>();
		msg.put("error", 1);
		msg.put("message", message);
		return msg;
	}

	@RequestMapping(value = "/fileManager", method = RequestMethod.POST)
	public void fileManager(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		ServletContext application = request.getSession().getServletContext();
		ServletOutputStream out = response.getOutputStream();
		// 根目录路径，可以指定绝对路径，比如 /var/www/attached/
		String rootPath = application.getRealPath("/") + "images/";
		// 根目录URL，可以指定绝对路径，比如 http://www.yoursite.com/attached/
		String rootUrl = request.getContextPath() + "/images/";
		// 图片扩展名
		String[] fileTypes = new String[] { "gif", "jpg", "jpeg", "png", "bmp" };

		String dirName = request.getParameter("dir");
		if (dirName != null) {
			if (!Arrays.<String> asList(
					new String[] { "image", "flash", "media", "file" })
					.contains(dirName)) {
				out.println("Invalid Directory name.");
				return;
			}
			rootPath += dirName + "/";
			rootUrl += dirName + "/";
			File saveDirFile = new File(rootPath);
			if (!saveDirFile.exists()) {
				saveDirFile.mkdirs();
			}
		}
		// 根据path参数，设置各路径和URL
		String path = request.getParameter("path") != null ? request
				.getParameter("path") : "";
		String currentPath = rootPath + path;
		String currentUrl = rootUrl + path;
		String currentDirPath = path;
		String moveupDirPath = "";
		if (!"".equals(path)) {
			String str = currentDirPath.substring(0,
					currentDirPath.length() - 1);
			moveupDirPath = str.lastIndexOf("/") >= 0 ? str.substring(0,
					str.lastIndexOf("/") + 1) : "";
		}

		// 排序形式，name or size or type
		String order = request.getParameter("order") != null ? request
				.getParameter("order").toLowerCase() : "name";

		// 不允许使用..移动到上一级目录
		if (path.indexOf("..") >= 0) {
			out.println("Access is not allowed.");
			return;
		}
		// 最后一个字符不是/
		if (!"".equals(path) && !path.endsWith("/")) {
			out.println("Parameter is not valid.");
			return;
		}
		// 目录不存在或不是目录
		File currentPathFile = new File(currentPath);
		if (!currentPathFile.isDirectory()) {
			out.println("Directory does not exist.");
			return;
		}
		// 遍历目录取的文件信息
		List<Hashtable> fileList = new ArrayList<Hashtable>();
		if (currentPathFile.listFiles() != null) {
			for (File file : currentPathFile.listFiles()) {
				Hashtable<String, Object> hash = new Hashtable<String, Object>();
				String fileName = file.getName();
				if (file.isDirectory()) {
					hash.put("is_dir", true);
					hash.put("has_file", (file.listFiles() != null));
					hash.put("filesize", 0L);
					hash.put("is_photo", false);
					hash.put("filetype", "");
				} else if (file.isFile()) {
					String fileExt = fileName.substring(
							fileName.lastIndexOf(".") + 1).toLowerCase();
					hash.put("is_dir", false);
					hash.put("has_file", false);
					hash.put("filesize", file.length());
					hash.put("is_photo", Arrays.<String> asList(fileTypes)
							.contains(fileExt));
					hash.put("filetype", fileExt);
				}
				hash.put("filename", fileName);
				hash.put("datetime",
						new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(file
								.lastModified()));
				fileList.add(hash);
			}
		}

		if ("size".equals(order)) {
			Collections.sort(fileList, new SizeComparator());
		} else if ("type".equals(order)) {
			Collections.sort(fileList, new TypeComparator());
		} else {
			Collections.sort(fileList, new NameComparator());
		}
		Map<String, Object> msg = new HashMap<String, Object>();
		msg.put("moveup_dir_path", moveupDirPath);
		msg.put("current_dir_path", currentDirPath);
		msg.put("current_url", currentUrl);
		msg.put("total_count", fileList.size());
		msg.put("file_list", fileList);
		response.setContentType("application/json; charset=UTF-8");
		String msgStr = objectMapper.writeValueAsString(msg);
		out.println(msgStr);
	}

	class NameComparator implements Comparator {
		@Override
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable) a;
			Hashtable hashB = (Hashtable) b;
			if (((Boolean) hashA.get("is_dir"))
					&& !((Boolean) hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean) hashA.get("is_dir"))
					&& ((Boolean) hashB.get("is_dir"))) {
				return 1;
			} else {
				return ((String) hashA.get("filename"))
						.compareTo((String) hashB.get("filename"));
			}
		}
	}

	class SizeComparator implements Comparator {
		@Override
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable) a;
			Hashtable hashB = (Hashtable) b;
			if (((Boolean) hashA.get("is_dir"))
					&& !((Boolean) hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean) hashA.get("is_dir"))
					&& ((Boolean) hashB.get("is_dir"))) {
				return 1;
			} else {
				if (((Long) hashA.get("filesize")) > ((Long) hashB
						.get("filesize"))) {
					return 1;
				} else if (((Long) hashA.get("filesize")) < ((Long) hashB
						.get("filesize"))) {
					return -1;
				} else {
					return 0;
				}
			}
		}
	}

	class TypeComparator implements Comparator {
		@Override
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable) a;
			Hashtable hashB = (Hashtable) b;
			if (((Boolean) hashA.get("is_dir"))
					&& !((Boolean) hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean) hashA.get("is_dir"))
					&& ((Boolean) hashB.get("is_dir"))) {
				return 1;
			} else {
				return ((String) hashA.get("filetype"))
						.compareTo((String) hashB.get("filetype"));
			}
		}
	}

}